Weather in Rapid City in September
Rapid City temperatures in September range from 10 to 25 and there is an average of 10 days of rain.
Avg Temp
10° - 25°
Avg Rainy Days
10
Avg Dry Days
20
Avg Snow Days
0
Weather Facts - Rapid City in September
* The warmest temperature recorded in in September is 41°C
* The coldest temperature recorded in Rapid City in September is (-3°C)
* The average rainfall in Rapid City in September is 37 mm